Tras la infidelidad de mi marido, hubo un acuerdo tácito de que no volveríamos a mencionarlo nunca.After my husband's cheating, there was a tacit agreement that we would not mention it ever again.
La pareja tenía un acuerdo tácito de que el que ganara más pagaría una parte mayor del alquiler.There was an unspoken agreement between the couple according to which the one who earned more would pay more of the rent.
María es tan anticuada que defiende la regla tácita de que debe ser el hombre quien se acerque primero a la mujer.Maria is so old-fashioned that she defends the unwritten rule that it should be the man who should approach the woman first.